Rook: Exodus (Rook: Exodus #2)

In the far future, the man known only as Rook wants out. He reckons anywhere is better than the crumbling planet Exodus, where all of nature - especially its imported animal population - has grown out of control as the world's engine has utterly failed. Scavenging for an escape vessel, he's interrupted by the power-hungry bear master named Ursaw, who won't stop until he rules all of what remains of Exodus. Also: Who is the mysterious Dire Wolf? And is she Rook's ally... or enemy?